Will give you a brainlist

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

In what part of the body does the most muscle activity happen?